<template>
  <div>
    <!-- 面包屑导航区 -->
    <el-breadcrumb separator-class="el-icon-arrow-right">
      <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
      <el-breadcrumb-item>权限管理</el-breadcrumb-item>
      <el-breadcrumb-item>角色列表</el-breadcrumb-item>
    </el-breadcrumb>
    <el-card class="box-card">
      <!-- 添加角色按钮 -->
      <el-row>
        <el-col>
          <el-button type="primary" size="medium" @click="addRoleDialogVisible = true">添加角色</el-button>
        </el-col>
      </el-row>
      <!-- 角色列表区域 -->
      <el-table :data="rolesList" border stripe max-height="565">
        <el-table-column type="expand">
          <template slot-scope="scope">
            <el-row v-for="(item1, i1) in scope.row.children" :key="item1.id"
                    :class="['bdbottom', i1 === 0 ? 'bdtop' : '', 'vcenter']">
              <!-- 一级权限 -->
              <el-col :span="5">
                <el-tag
                  closable
                  @close="romveRightById(scope.row, item1.id)">
                  {{ item1.authName }}
                </el-tag>
                <i class="el-icon-caret-right"></i>
              </el-col>
              <!-- 二三级权限 -->
              <el-col :span="19">
                <!-- 通过for循环 嵌套渲染二级权限 -->
                <el-row v-for="(item2, i2) in item1.children" :key="item2.id"
                        :class="[i2 === 0 ? '': 'bdtop', 'vcenter']">
                  <el-col :span="6">
                    <el-tag
                      type="success"
                      closable
                      @close="romveRightById(scope.row, item2.id)">
                      {{ item2.authName }}
                    </el-tag>
                    <i class="el-icon-caret-right"></i>
                  </el-col>
                  <!-- 通过for循环 嵌套渲染三级权限 -->
                  <el-col :span="18">
                    <el-tag
                      type="warning"
                      v-for="(item3) in item2.children" :key="item3.id"
                      closable
                      @close="romveRightById(scope.row, item3.id)">
                      {{ item3.authName }}
                    </el-tag>
                  </el-col>
                </el-row>
              </el-col>
            </el-row>
          </template>
        </el-table-column>
        <el-table-column type="index" label="序号"></el-table-column>
        <el-table-column prop="roleName" label="角色名称"></el-table-column>
        <el-table-column prop="roleDesc" label="角色描述"></el-table-column>
        <el-table-column label="操作" width="240px">
          <template slot-scope="scope">
            <el-button type="primary" size="mini" @click="showEditRoleDiaolog(scope.row.id)">编辑</el-button>
            <el-button type="danger" size="mini" @click="deleteRoleDiaolog(scope.row.id)">删除</el-button>
            <el-button type="warning" size="mini" @click="showSetRightDiaolog(scope.row)">分配权限</el-button>
          </template>
        </el-table-column>
      </el-table>
    </el-card>
    <!-- 添加角色的对话框 -->
    <el-dialog
      title="添加角色"
      :visible.sync="addRoleDialogVisible"
      width="25%" @close="addRoleDialogClosed">
      <el-form
        ref="addRoleFormRef"
        :model="addRoleForm"
        :rules="addRoleFormRules"
        label-width="80px">
        <el-form-item label="角色名称" prop="roleName">
          <el-input v-model="addRoleForm.roleName"></el-input>
        </el-form-item>
        <el-form-item label="角色描述" prop="roleDesc">
          <el-input v-model="addRoleForm.roleDesc"></el-input>
        </el-form-item>
      </el-form>
      <!-- 底部区域 -->
      <span slot="footer" class="dialog-footer">
    <el-button @click="addRoleDialogVisible = false">取 消</el-button>
    <el-button type="primary" @click="addRole">确 定</el-button>
  </span>
    </el-dialog>
    <!-- 修改角色的对话框 -->
    <el-dialog
      title="修改角色"
      :visible.sync="editRoleDialogVisible"
      width="25%" @close="editRoleDialogClosed">
      <el-form
        ref="editRoleFormRef"
        :model="editRoleForm"
        :rules="editRoleFormRules"
        label-width="80px">
        <el-form-item label="角色名称" prop="roleName">
          <el-input v-model="editRoleForm.roleName"></el-input>
        </el-form-item>
        <el-form-item label="角色描述" prop="roleDesc">
          <el-input v-model="editRoleForm.roleDesc"></el-input>
        </el-form-item>
      </el-form>
      <!-- 底部区域 -->
      <span slot="footer" class="dialog-footer">
    <el-button @click="editRoleDialogVisible = false">取 消</el-button>
    <el-button type="primary" @click="editRole">确 定</el-button>
  </span>
    </el-dialog>
    <!-- 分配角色的对话框 -->
    <el-dialog
      title="分配权限"
      :visible.sync="setRightDialogVisible"
      width="50%" @close="setRightDialogClosed">
      <!-- 树形控件 -->
      <el-tree :data="rightslist" :props="treeProps"
               show-checkbox node-key="id" default-expand-all
               :default-checked-keys="defKeys" ref="treeRef">
      </el-tree>
      <!-- 底部区域 -->
      <span slot="footer" class="dialog-footer">
        <el-button @click="setRightDialogVisible = false">取 消</el-button>
        <el-button type="primary" @click="allotRights">确 定</el-button>
      </span>
    </el-dialog>
  </div>
</template>

<script>
export default {
  name: 'Roles',
  data() {
    return {
      // 所有角色列表
      rolesList: [],
      // 控制添加角色对话框的显示与隐藏
      addRoleDialogVisible: false,
      // 角色添加
      addRoleForm: {
        roleName: '',
        roleDesc: ''
      },
      // 角色添加表单验证
      addRoleFormRules: {
        roleName: [
          {required: true, message: '请输入角色名称', trigger: 'blur'},
          {min: 2, max: 10, message: '长度在 2 到 10 个字符', trigger: 'blur'}
        ],
        roleDesc: [
          {required: true, message: '请输入角色描述', trigger: 'blur'}
        ]
      },
      // 控制修改角色对话框的显示与隐藏
      editRoleDialogVisible: false,
      // 查询到的角色信息对象
      editRoleForm: {},
      // 修改表单的验证规则对象
      editRoleFormRules: {
        roleName: [
          {required: true, message: '请输入角色名称', trigger: 'blur'},
          {min: 2, max: 10, message: '长度在 2 到 10 个字符', trigger: 'blur'}
        ],
        roleDesc: [
          {required: true, message: '请输入角色描述', trigger: 'blur'}
        ]
      },
      // 控制分配权限对话框的显示与隐藏
      setRightDialogVisible: false,
      // 所有权限的数据
      rightslist: [],
      // 树形控件的属性绑定对象
      treeProps: {
        children: 'children',
        label: 'authName'
      },
      // 默认选中的节点ID值数组
      defKeys: [],
      // 当前即将分配权限的角色id
      roleId: ''
    }
  },
  created() {
    this.getRolesList()
  },
  methods: {
    // 获取角色列表信息
    async getRolesList() {
      const {data: res} = await this.$http.get('roles')
      if (res.meta.status !== 200) {
        return this.$message.error(res.meta.msg)
      }
      this.rolesList = res.data
    },
    // 添加角色
    addRole() {
      // 提交请求前，表单预验证
      this.$refs.addRoleFormRef.validate(async valid => {
        if (!valid) return
        const {data: res} = await this.$http.post('roles', this.addRoleForm)
        // console.log(res)
        if (res.meta.status !== 201) {
          return this.$message.error(res.meta.msg)
        }
        this.$message.success(res.meta.msg)
        // 隐藏添加角色对话框
        this.addRoleDialogVisible = false
        this.getRolesList()
      })
    },
    // 监听添加角色对话框的关闭事件,清空输入
    addRoleDialogClosed() {
      this.$refs.addRoleFormRef.resetFields()
    },
    // 展示编辑角色对话框
    async showEditRoleDiaolog(id) {
      // console.log(id)
      const {data: res} = await this.$http.get('roles/' + id)
      if (res.meta.status !== 200) {
        return this.$message.error(res.meta.msg)
      }
      this.editRoleForm = res.data
      // console.log(this.editRoleForm)
      this.editRoleDialogVisible = true
    },
    // 监听编辑角色对话框的关闭事件
    editRoleDialogClosed() {
      this.$refs.editRoleFormRef.resetFields()
    },
    // 修改信息并验证
    editRole() {
      this.$refs.editRoleFormRef.validate(async valid => {
        // 表单预校验失败
        if (!valid) return
        // 发起修改用户信息的数据请求
        const {data: res} = await this.$http.put('roles/' + this.editRoleForm.roleId, {
          roleName: this.editRoleForm.roleName,
          roleDesc: this.editRoleForm.roleDesc
        })
        console.log(res)
        if (res.meta.status !== 200) {
          return this.$message.error(res.meta.msg)
        }
        // 隐藏编辑角色对话框
        this.editRoleDialogVisible = false
        // 刷新数据列表
        this.getRolesList()
        // 提示修改成功
        return this.$message.success(res.meta.msg)
      })
    },
    // 删除角色
    async deleteRoleDiaolog(id) {
      const confirmResult = await this.$confirm('此操作将永久删除该角色, 是否继续?', '提示', {
        confirmButtonText: '确定',
        cancelButtonText: '取消',
        type: 'warning'
      }).catch(err => err)
      // 点击确定 返回值为：confirm
      // 点击取消 返回值为： cancel
      if (confirmResult !== 'confirm') {
        return this.$message.info('已取消删除')
      }
      const {data: res} = await this.$http.delete('roles/' + id)
      if (res.meta.status !== 200) {
        return this.$message.error(res.meta.msg)
      }
      this.$message.success(res.meta.msg)
      this.getRolesList()
    },
    // 根据id删除对应的角色
    async romveRightById(role, rightId) {
      // 弹框提示是否要删除权限
      const confirmResult = await this.$confirm('此操作将永久删除该权限, 是否继续?', '提示', {
        confirmButtonText: '确定',
        cancelButtonText: '取消',
        type: 'warning'
      }).catch(err => err)
      if (confirmResult !== 'confirm') {
        return this.$message.info('已取消删除')
      }
      // console.log(role, rightId)
      const {data: res} = await this.$http.delete(`roles/${role.id}/rights/${rightId}`)
      if (res.meta.status !== 200) {
        return this.$message.error(res.meta.msg)
      }
      // 删除之后获得最新权限赋值
      role.children = res.data
    },
    // 展示分配权限对话框
    async showSetRightDiaolog(role) {
      this.roleId = role.id
      // 获取所有权限的数据
      const {data: res} = await this.$http.get('rights/' + 'tree')
      if (res.meta.status !== 200) {
        return this.$message.error(res.meta.msg)
      }
      // 把获取到的权限数据保存到 data 中
      this.rightslist = res.data
      // 递归获取三级节点的ID
      this.getLeafKeys(role, this.defKeys)
      this.setRightDialogVisible = true
    },
    // 通过递归的形式，获取角色下所有三级权限的id，并保存到defKeys数组中
    getLeafKeys(node, arr) {
      // 如果当前node节点不包含children属性，则是三级节点
      if (!node.children) {
        return arr.push(node.id)
      }
      node.children.forEach(item => this.getLeafKeys(item, arr))
    },
    // 监听分配权限对话框的关闭事件
    setRightDialogClosed() {
      this.defKeys = []
    },
    // 点击为角色分配权限
    async allotRights() {
      const keys = [
        // getCheckedKeys选中的节点key所组成的数组
        // getHalfCheckedKeys半选中的节点所组成的数组
        ...this.$refs.treeRef.getCheckedKeys(),
        ...this.$refs.treeRef.getHalfCheckedKeys()
      ]
      // console.log(keys)
      const idStr = keys.join(',')
      const {data: res} = await this.$http.post(`roles/${this.roleId}/rights`, {rids: idStr})
      if (res.meta.status !== 200) {
        this.$message.error(res.meta.msg)
      }
      this.$message.success(res.meta.msg)
      this.getRolesList()
      this.setRightDialogVisible = false
    }
  }
}
</script>

<style lang="less" scoped>
.el-tag {
  margin: 7px;
}

.bdtop {
  border-top: 1px solid #eee;
}

.bdbottom {
  border-bottom: 1px solid #eee;
}

.vcenter {
  display: flex;
  align-items: center;
}
</style>
